Alternatively the parser could be re implemented / redesigned so as to better and more efficiently find frame boundaries
Fixes: Timeout Fixes: 9210/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PBM_fuzzer-4770771833454592 Fixes: 9214/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PPM_fuzzer-5741633353023488 Fixes: 9219/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PGM_fuzzer-6249230237696000 Fixes: 9550/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PAM_fuzzer-5312669836902400 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> --- libavcodec/pnm_parser.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/libavcodec/pnm_parser.c b/libavcodec/pnm_parser.c index bdd7f2b505..4bcd0ddd5d 100644 --- a/libavcodec/pnm_parser.c +++ b/libavcodec/pnm_parser.c @@ -51,8 +51,9 @@ retry: if (pc->index) { pc->index = 0; } else { - buf++; - buf_size--; + unsigned step = FFMAX(1, pnmctx.bytestream - pnmctx.bytestream_start); + buf += step; + buf_size -= step; } goto retry; } -- 2.18.0 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
